KR-20260064114-A - AUTOMATIC SPLICING DEVICE FOR UPPER FLASKS USED IN HORIZONTAL CENTRIFUGAL CASTING AND THE HORIZONTAL CENTRIFUGAL CASTING DEVICE EQUIPPED WITH THE SAME

KR20260064114AKR 20260064114 AKR20260064114 AKR 20260064114AKR-20260064114-A

Abstract

The present invention relates to an automatic joining device for a horizontal centrifugal casting upper flask and a horizontal centrifugal casting apparatus equipped with the same. More specifically, the invention relates to an automatic joining device for facilitating centering between a mold and an upper flask when joining a mold and an upper flask during the manufacturing of a rolling roll, particularly a work roll, using a horizontal centrifugal casting process, and a horizontal centrifugal casting apparatus equipped with the same.

Inventors

김한빈
김경아

Assignees

현대제철 주식회사

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (8)

In an automatic joining device for manufacturing a rolling roll using a horizontal centrifugal casting process, which combines a mold into which an outer layer material and an inner layer material are injected, and an upper flask into which an inner layer material is injected and which is coupled to the upper part of the mold, The above automatic combining device is, A first automatic joining device disposed on the upper surface of the above mold, and It includes a second automatic combining device disposed on the lower surface of the upper flask, and An automatic combining device characterized by the fact that when the distance between the first automatic combining device and the second automatic combining device is less than or equal to a predetermined distance, the first automatic combining device and the second automatic combining device automatically combine to automatically combine the upper flask and the mold.
In Article 1, An automatic combining device characterized by automatically combining the mold and the upper flask such that the center of the mold and the center of the upper flask coincide.
In Article 1, An automatic joining device characterized in that the first automatic joining device and the second automatic joining device are composed of magnets having opposite polarities.
In Paragraph 3, The magnitude of the magnetic force required for the above automatic bonding device is 7.85 kN or more and 700 kN or less, and An automatic joining device characterized by the fact that the magnitude of the magnetic flux density required for the above magnet is 500 G or more and 5000 G or less.
In a horizontal centrifugal casting device used for manufacturing rolling rolls, The above horizontal centrifugal casting device comprises a mold into which an outer layer material and an inner layer material are injected, and An upper-shaped flask coupled to the upper part of the above mold and into which an inner layer material is injected, and It includes an automatic combining device that automatically combines the upper mold flask and the mold, and The above automatic combining device is, A first automatic joining device disposed on the upper surface of the above mold, and It includes a second automatic combining device disposed on the lower surface of the upper flask, and A horizontal centrifugal casting apparatus characterized in that, when the distance between the first automatic joining device and the second automatic joining device is less than or equal to a predetermined distance, the first automatic joining device and the second automatic joining device automatically join to automatically join the upper flask and the mold.
In Article 5, The above automatic combining device is, A horizontal centrifugal casting apparatus characterized by automatically combining the mold and the upper flask so that the center of the mold and the center of the upper flask coincide.
In Article 5, A horizontal centrifugal casting device characterized in that the first automatic joining device and the second automatic joining device are composed of magnets having opposite polarities.
In Article 7, The magnitude of the magnetic force required for the above automatic bonding device is 7.85 kN or more and 700 kN or less, and A horizontal centrifugal casting apparatus characterized by the fact that the magnitude of the magnetic flux density required for the above magnet is 500 G or more and 5000 G or less.

Description

Automatic splicing device for upper flasks used in horizontal centrifugal casting and horizontal centrifugal casting device equipped with the same The present invention relates to an automatic joining device for a horizontal centrifugal casting upper flask and a horizontal centrifugal casting apparatus equipped with the same. More specifically, the invention relates to an automatic joining device for facilitating centering between a mold and an upper flask when joining a mold and an upper flask during the manufacturing of a rolling roll, particularly a work roll, using a horizontal centrifugal casting process, and a horizontal centrifugal casting apparatus equipped with the same. Centrifugal casting, used in the manufacture of rolling rolls, is a widely used casting method to ensure the quality and high durability of rolling rolls. The centrifugal casting process involves injecting molten metal while rotating a cylindrical mold around its central axis, and then compressing and solidifying the molten metal against the inner surface of the mold using centrifugal force to produce a tubular casting. Depending on the direction of the mold's central axis during rotation, it is classified into horizontal centrifugal casting and vertical centrifugal casting. In the case of vertical centrifugal casting, the mold and flask are joined in advance during the injection of the outer layer, so a joining process is not required before the injection of the inner layer. However, in the case of horizontal centrifugal casting, unlike vertical centrifugal casting, the outer layer is injected in a horizontal state and the flask is positioned vertically to inject the inner layer; therefore, a process of joining the mold and flask is required before the injection of the inner layer. In this horizontal centrifugal casting process, at least four workers are required for the joining process of the mold and the upper flask. Since the workers manually adjust the direction of the flask to align the center of the upper flask with the center of the mold, there is a possibility of safety issues such as collision and falling of the mold, burns from contact with the high-temperature mold, and hand pinching during joining, which exposes workers to various hazards and takes a relatively long time. However, compared to vertical centrifugal casting, where the outer layer material is injected only in a vertical state, horizontal centrifugal casting is open on both the left and right sides during the process, allowing for good air circulation and increased cooling capacity. Consequently, in rolling rolls produced by the horizontal centrifugal casting process, the structure of the outer layer material becomes finer and more uniform, making it possible to obtain rolling rolls with an outer layer material of superior quality. Therefore, despite the aforementioned problems, the use of horizontal centrifugal casting is inevitable. Figure 1 is an image schematically showing a vertical centrifugal casting method. FIG. 2a is an image schematically showing the process of injecting an outer layer material using a horizontal centrifugal casting device. FIG. 2b is an image schematically showing the process of injecting an inner layer material using a horizontal centrifugal casting device. FIG. 3 is an image showing workers combining an upper flask and a mold in a conventional horizontal centrifugal casting apparatus. FIGS. 4a to 4c are perspective views showing the horizontal centrifugal casting upper-form flask automatic joining device according to the present invention and the joining process of the horizontal centrifugal casting device equipped with the same. Figure 5 is a relationship equation showing the relationship between the magnetic force and magnetic flux density of a magnet between two parallel planes. The present invention relates to an automatic upper-shaped flask joining device that can be used in a horizontal centrifugal casting process and a horizontal centrifugal casting device equipped with the same, and in particular, to a horizontal centrifugal casting process for manufacturing rolling rolls. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the embodiments described in detail below. Furthermore, these embodiments are provided to more fully explain the present invention to those skilled in the art. Accordingly, the shapes or positions of elements in the drawings may be exaggerated to emphasize clearer explanations. In the following description, specific descriptions of parts that can be easily implemented by a person skilled in the art may be omitted. First, to aid in understanding the present invention, a case where a vertical centrifugal casting process is used in the manufacture of rolling rolls is briefly explained with reference to Fig. 1. The vertical centrifugal casting method is a method in which a mold is arranged vertically a